altamore



Aug. 16, 1949. s. ALTAMORE 23,141

RECIRCULATING SYSTEM FOR GAS FIRED OVENS Original Filed 001:. 22, 1945 sSheets-Sheet 1 Inventor 'lS Eaaar/ay A 4 ranch:

Attorneys Aug. 16, 1949. s. ALTAMORE v REGIRCULATING SYSTEM FOR GASFIRED OVENS 3 She ets-Sheet 2 Original Filed Oct. 22, 1943 Inventor a-BMA Ito rn e];

3 SheetsSheet 3 Inventor SEBQSTm/JL 717M 05 Attorneys Reissued Aug. 16,1949 UNITE'DL- -STATES PATENT OFFICE.

RECIRQULATING SYSTEM FOBeGAS OVENS Sebastian Altamore, Maspeth, N. Y;Original N0. 12,369,706, dated Feb1'uary. -20, 19.45,--

Serial No.-507,34'7, October .22, 1943..lApplicationhfor.reissueFebrual-y 20,1946; Serial .l\ lo.,

'7 Claims. ,(Cl. 263- 8) This invention relates to newand useful im-...

provements in recirculating-systems. for ovens in, which work is heated.

The principal object of the present invention.

is to provide a. special recirculating system for heating ovens wherein.the .heat is equally dis-.,

tributed across the work.

Another important object; of the invention is .to. provide a specialrecirculatingunit for heating..-

ovens which will serve to recirculateheated air in a circular motionacross the oven.

Other objects and advantages. of the invention... will become apparent.to the .readenof the, f01- lowing description.

In the drawings:

Figure 1 isa top. plan. .vi ew..of the improved-..

OVBII.

Figure 2 is afragmentaryyertical longitudinaL.

view .thro-ughthe oven. Figure 3 is, an outsideelevational.view..of oneof the recirculating unit shown inrelationtoa,

section of the oven shell.

Figure 4 is an insideelevational view,- of the,

unit shown in Figure 3,. V

Figure 5 is an enlarged detailed sectional .view.

taken substantially on the line 5,-5 ofFigure 3.

Referring to the drawings wherein like numerals designate-like-parts-,--it can-"be seen that numeral 5 denotes an oven shell openat its end 6 and provided with a sloping end wall I at its opposite end.At the latter end of the shell 5,

the top has a hood!) from" which extendsa con duit 9 to a suction-blowerIll driven by an electric motor "H and from the outlet side of whichrises a stack [2. Just under thehoodiB andWith-J.

in the shell 51s a bafifle platel 3.

Numeral M denotes a floor for the shell 5 over which travels the upperflight of an endless conveyer l5, the lower flight of which passes underthe floor l4, and it will be observed in Figure 2, that the conveyorbelt passes over suitable rollers or the like l6.

Cooling fans I! (motor driven) are located within the end 6 of the ovenand this fan-means supplies cool air that travels just under the top ofthe shell 5 and is drawn to the opposite end of the shell 5 by thesuction blower Ill acting through the hood 8.

The conveyer l5 carries work through the oven and in the path ofcircular activities of the air set up by heating and recirculating unitseach of which is denoted generally by numeral 18. This particular unitis shown clearly in Figures 3, 4 and 5.

substantially .faneshaped ,upwardly tapering con.

duitJZ which.passes.. through; theadjacent side. wall of, theovenshelLiand terminates in a nar-. row,v elongated .mouth...2 3.,nneledge of whichis. bent. outwardly to defineadeflector lip 24. .JIhe.mouth. 3. isLdisposedxertically. as clearly shown in Figllrei: .W

Through the lowerportion .of the same side wall of theshelli.and...for.the.sa1ne unit..l.8 an elon-... gatedmouth fi is pr0vided..and, ha1f,..of said. mouthspecially;envelopssa.gas .burner.,26 having. aplurality of jets 21 and which has a fuels-sup.

plypipe-28. A flaredcondult- 29 connects the mouth .25 with theexhaust;or outlet-side of, the...

suction blower-fan 2H ofithisunit Ill. 7 It can .nowbe seen.that-.whenlthe units-.l-aare functioning, and vthe.vb irnerssfli.thereof are-in operation, thejblower ,fansl-lll ofthese :units-Will- 7.force the intake gases-across the-burners 26,- thusheating the air andethersintake gasess The interior -of the .ovenshell'. .5. has curvedbailie-platese-p, 30 in the ,corners :thereof .to. assistin causing .aturbulentaction.oiltheheated ;air and other gasesr as they pass incirculation...out.. of. the mouth =25 throughand againstthework locatedon the cone. veyer I 5 and -.-whiche;are.then. sucked...back; the .-t

unitlllby, way. of themouth 23..and conduit. 22.

This air is. recirculatedtimeand.again,-. each timehbeing.rel'leated.v

As shown in. Figs. 2,..theeintake-or inlet I mouths 23 are located-above....,t he .lconveyer,J5. --,ThB

broken rectangular figure in Fig. 5 indicates one of the work-pieces.

While the foregoing specification sets forth the invention in specificterms, it is to be understood that numerous changes in the shape, sizeand materials may be resorted to without departing from the spirit andscope of the invention as claimed hereinafter.

Having described the invention, what is claimed as new is:

1. A recirculating system for heating ovens comprising an elongatedshell having an open inlet end, a unit at one side of the shell, saidunit including a suction blower device, a suction mouth located withinthe shell and being in communication with the intake side of the suctionblower device, an outlet mouth located within the lower portion of theoven and being in communication with the exhaust side of the suctionblower de- Each unit 18 consists of a suction blower convice, andheating means within the last-mentioned mouth, and means for circulatingcool air, longitudinally through the oven at the upper portion thereofcomprising blowers at said open end of the shell and at the bottomthereof, and a forced draft air evacuating unit at the other end of theshell on top thereof.

2. An oven which has a support for the work which is to be heated, saidoven having an ovenopening, said oven also having an oven gas outletwhich is located above said oven-opening and said support, said oven gasoutlet bein also longitudinally spaced from said oven-opening in ahorizontal direction, gas-injection means associated with saidoven-opening and operative to inject gas upwardly into said oven abovesaid support at said oven-opening and longitudinally towards said ovengas outlet above said support, said injected gas being free to travelinwardly in said oven above said support towards said oven gas outlet,at gas-circulating device, said device having a gas-circulating inlet insaid oven and a gas-circulating outlet in said oven and a heater andgas-circulating means to draw in gas at said gas-circulating inlet andto discharge gas through said gas-circulating outlet, saidgas-circulating inlet being located above said support and saidgas-circulating outlet and below said oven gas outlet, saidgas-circulating inlet and said gas-circulatin outlet being locatedintermediate said oven-opening and said oven gas outlet in a horizontaldirection, said gas-circulating inlet and said gas-circulating outletbeing connected to said oven in a direction which is lateral to saidhorizontal direction to draw and to discharge gas in a direction whichis lateral to said horizontal direction.

3. An oven according to claim 2 in which said gas-circulating inlet islocated substantially directly above said gas-circulating outlet.

4. In combination, an oven which has a longitudinal axis, said ovenhaving an air-inlet end at one end of said oven, said oven havinganother open end at the other end of said oven, conveyer means forconveying work-pieces through said oven, said conveyor means beingspaced vertically iroin'the top and bottom of said oven,air-propellingnieans located at said air-inlet end and adapted to forcea current or air into said oven at said aireinlet end and through saidoven and above'said conveyer means towards said other end or said oven,a forced-draught evacuating unit which has an inlet port whichcommunicates with said oven at the top of said oven at said other end,said unit being adapted and constructed to withdraw gases laterally fromsaid oven at said inlet port, and an air-circulating device external tosaid oven and located at a side of said oven, said air-circulatingdevice having an inlet pipe which has an inlet mouth which is located insaid oven below the top of said oven in the path of said current of air,said air-circulating device having an outlet pipe which has an outletmouth which is located in said oven below said conveyer means, and aheater located in said oven at said outlet mouth, said oven being closedbetween said ends save at said port.

5. A combination according to claim 4, in which said heater is anunshielded burner which has burner-jets which are located directly atsaid outlet mouth.

6. An oven which has a longitudinal axis, said oven havinglongitudinally alined oven-inlet and oven-outlet openings, alongitudinally movable and endless conveyor which has a longitudinal runwhich passes through said oven-inlet and oven-outlet openings,air-propelling means located at said oven-inlet opening, saidair-propelling means being disposed and operative to produce a currentof air which is upwardly directed at said oven-inlet opening and whichmoves longitudinally from said oven-inlet opening in a longitudinal pathabove said conveyor towards said oven-outlet opening, a suction deviceconnected to said oven-outlet opening, a lateral gas-circulating devicelocated longitudinally between said oven-inlet opening and saidoven-outlet opening, said gas circulating device having a gas inletwhich communicates with said oven above said run and having a gas outletwhich communicates with said oven below said run, said gas inlet andsaid gas outlet being substantially superposed, said gas-circulatingdevice having means to force gas through said gas-circulating device,said gas-circulating device having a heater to heat the gas which iscirculated through said gas-circulating device.

7. An oven according to claim 6, said oven having a baflie at saidoutlet, said baflle being shaped to upwardly deflect the gas whichissues from said outlet.

SEBASTIAN ALTAMORE,

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 2,129,634 Albright Sept. 13, 19382,230,800 Hormel Feb. 4, 1941

